Stable and fast domain wall dynamics in nanocrystalline magnetic microwire

Klein, Peter; Varga, R.; Vázquez, M.

doi:10.1016/j.jallcom.2012.09.098

Cited by 19 publications

(11 citation statements)

References 33 publications

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“…a). For this study, we have chosen the FeCoMoB wire annealed at 500 °C for 1 h, which has been shown to exhibit fast domain‐wall dynamics that is assumed to be connected to the vortex structure of the domain wall . The domain‐wall dynamics in this wire shows a local maximum at 570 A m −1 that can be assigned to the Walker limit of the vortex domain wall (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Study of the single domain‐wall structure in glass‐coated microwires

Varga

Klein

Jiménez

et al. 2015

Physica Status Solidi (a)

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We present the complex study of the domain‐wall structure in glass‐coated microwires using different methods based on the application of transversal and circular magnetic fields. The results can be understood in terms of two possible structures of domain walls being transversal at low fields and vortex at high fields. Moreover, it is shown that a vortex domain wall does not nucleate at the beginning of propagation, but it is transformed from a transversal domain wall after its depinning.

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Section: Resultsmentioning

confidence: 99%

“…At least two types of domain‐wall structure (transverse and vortex) have been assumed in glass‐coated microwires (that could be similar to those assumed to the simulation in Ref. , see Fig.…”

Section: Introductionmentioning

confidence: 99%

Study of the single domain‐wall structure in glass‐coated microwires

Varga

Klein

Jiménez

et al. 2015

Physica Status Solidi (a)

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“…Nowadays, the domain wall (DW) dynamics in thin magnetic wires represents an extremely exciting topic for both fundamental research and applications, mainly as concerns the development of novel, miniaturized magnetic sensors and DW-based logic devices 1,2 . In the case of logic devices, a particular attention is given to the easy manipulation and propagation of the magnetic DWs within the magnetic materials which function as DW conduits 3,4 . In magnetic nanowires, the DW motion can be driven either by an applied external magnetic field or by a spin-polarized electric current 5–8 .…”

Section: Introductionmentioning

confidence: 99%

Field and Current Controlled Domain Wall Propagation in Twisted Glass-Coated Magnetic Microwires

Corodeanu

Chiriac

Damian

et al. 2019

Sci Rep

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The torsion effect on the field and current driven magnetization reversal and the associated domain wall velocity in cylindrical amorphous and nanocrystalline glass-coated microwires is reported. Samples from three representative compositions have been investigated: (1) amorphous Fe 77.5 Si 7.5 B 15 with positive magnetostriction, λ ≅ 25 × 10 −6 , (2) amorphous Co 68.18 Fe 4.32 Si 12.5 B 15 with nearly zero negative magnetostriction, λ ≅ −1 × 10 −7 , and (3) nanocrystalline Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3 (FINEMET) with small positive magnetostriction, λ ≅ 2.1 × 10 −6 , all having the diameter of the metallic nucleus, d , of 20 µm and the glass coating thickness, t g , of 11 µm. The results are explained through a phenomenological interpretation of the effects of applied torque on the anisotropy axes within the microwires with different characteristics. Among all the complex mechanical deformations caused by the application of torque on magnetic microwire samples, the most important are the axial compression – for axial field-driven domain wall motion, and the circumferential tension – for electrical current/circumferential field-driven domain wall motion. The Co 68.18 Fe 4.32 Si 12.5 B 15 microwire, annealed at 300 °C for 1 hour and twisted at 168 Rad/m exhibits the optimum characteristics, e.g. the lowest switching current (down to 9 mA~2.9 × 10 −3 A/cm 2 ) and the largest domain wall velocity (up to 2300 m/s).

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“…One of the most actual directions in the study of microwires is the investigation of domain‐wall motion, collision, etc. . The displacement of a solitary DW is the basic mechanism of the magnetization reversal in microwires.…”

Section: Introductionmentioning

confidence: 99%

“…Magnetization reversal curves [12] were obtained by measurement of the averaged image contrast of the microwire surface as a 3 Background One of the most actual directions in the study of microwires is the investigation of domain-wall motion, collision, etc. [13][14][15][16][17][18]. The displacement of a solitary DW is the basic mechanism of the magnetization reversal in microwires.…”

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confidence: 99%

On mechanisms of domain switching in amorphous glass‐coated wires

Chizhik

Stupakiewicz

Zhukov

et al. 2015

Physica Status Solidi (a)

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The study of the magnetic properties of amorphous wires is a topic of great interest because of their outstanding properties, such as the giant magnetoimpedance effect. The domain structure of the amorphous wire consists of an axially magnetized inner core and the outer shell. Taking into account that the giant magnetoimpedance effect is mainly a surface effect, the investigation of surface magnetic structure in the outer shell becomes a special topic. Discovering earlier the basic domain structures, here we demonstrate the original domain structures and mechanisms of magnetization reversal in Co-and Fe-rich glass-covered microwires. In particular, we focused on the temperature dependence of the magnetization reversal process. The original effect -the rearrangement of domain structure without the domain walls movement -was found.ß 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 1 Introduction The giant magnetoimpedance (GMI) effect is a topic of great interest in the field of applied magnetism owing to the large sensitivity of the total impedance to an applied magnetic field [1-8]. Our previous investigation using the magneto-optical Kerr effect (MOKE) showed that the surface magnetic structure has a great influence on the value of the GMI ratio [8]. In particular, it was shown that the change of circular magnetization is the essential process influencing GMI. Generally, the mechanism of the magnetization reversal process in microwires consists of nucleation of magnetic domain structures [9], magnetic domain-wall (DW) motion, domain-structure transformations, magnetization switching between different magnetization states, and coherent rotation of magnetization. Earlier our investigations were focused on the single or multidomain-wall motion [10] and formation of multidomain structure. However, as reported in the present work, this magnetization reversal consists not only of DW motion but also of domain-structure rearrangement which does not include the DW motion. Here, we demonstrate the unusual mechanism of domain-structure transformation of both DW motion and magnetization switching of domain structures.

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Stable and fast domain wall dynamics in nanocrystalline magnetic microwire

Cited by 19 publications

References 33 publications

Study of the single domain‐wall structure in glass‐coated microwires

Study of the single domain‐wall structure in glass‐coated microwires

Field and Current Controlled Domain Wall Propagation in Twisted Glass-Coated Magnetic Microwires

On mechanisms of domain switching in amorphous glass‐coated wires

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